I bought this item to extend my rack mounted cymbal arms since the down tubes are only 13in long and wanted my two front mounted crash cymbals a little higher.This product does exactly what it is designed to and the clamps get nice and tight with no slipping.Also the tubes themselves are thicker than Gibraltar tubes so they dont crush as easy from the rack clamps.There is only two drawbacks to this item.The first is there are no end caps on the bottom of the tubes but you can find ones to fit at your local Lowe's in the hardware section.The other is they use the same clamps as on the 2000 and 1000 series cymbal stands which require the Pearl made memory clamps for these specific stands as there is no notch to fit a generic memory clamp.